About Hubert Oswell

Hubert is Asbel's younger brother. He is fostered into the Oswell family to secure Asbel's succession to Lord. Hubert resents Asbel for deserting Lhant, perceiving the act as spiting his sacrifice, and his parents for abandoning him. He overcomes his anger when he reunites with his family seven years later. Due to his capabilities, he is appointed the lieutenant of the Strahta military.

Synopsis from Wikipedia's Tales of Graces page.